1 Find "Text messages (SMS)"
Press the menu icon.
Press Messages.
Press Menu.
Press Settings.
Press Text messages (SMS).
2 Turn request for delivery reports on or off
Press Delivery reports to turn the function on or off.
When the field next to the menu item is ticked (V), the function is turned on.
3 Save the message centre number
Press Service center.
Key in +35387699989 and press OK.
4 Exit
Press the Home key to return to standby mode.